cloud Xen 3.4.4 Hypervisor testing on CentOS 6.2 (Final) via the Phoronix Test Suite. 2cores: Processor: Intel Xeon W3565 @ 3.20GHz (2 Cores), Memory: 4096MB, Disk: 15GB OS: CentOS 6.2 (Final), Kernel: 2.6.32-220.13.1.el6.x86_64 (x86_64), Compiler: GCC 4.4.6 20120305, File-System: ext3, Screen Resolution: 800x600, System Layer: Xen 3.4.4 Hypervisor 4cores: Processor: Intel Xeon W3565 @ 3.20GHz (4 Cores), Memory: 4096MB, Disk: 15GB OS: CentOS 6.2 (Final), Kernel: 2.6.32-220.13.1.el6.x86_64 (x86_64), Compiler: GCC 4.4.6 20120305, File-System: ext3, Screen Resolution: 800x600, System Layer: Xen 3.4.4 Hypervisor Apache Benchmark 2.4.3 Static Web Page Serving Requests Per Second > Higher Is Better 2cores . 4514.56 |======================================== 4cores . 6877.35 |=============================================================